Malicious PDF — malware analysis report

Static analysis result for SHA-256 445fefb044dddd14…

MALICIOUS

PDF

91.6 KB Created: 2021-07-24 12:54:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: bbd36a28f3362a97325be45f5acd2ce5 SHA-1: ec25fc9f492446efc43ef233a1485d5c93b598b8 SHA-256: 445fefb044dddd144576505bfaab98a53cb47fdc0468f582e552b5467f746741
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier with high confidence. Heuristics indicate the document is a link farm pointing to multiple compromised WordPress sites, likely serving as a lure for phishing or malware distribution. While no scripts were explicitly extracted, the nature of the link farm suggests an intent to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160870d58dfaf8---zuxobijuzimapewup.pdf In PDF document text
    • https://arrad.ch/modules/ck/ckfinder/userfiles/files/sepebanomogo.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/21492566c98af85fa347dfe3c1a140aa/xomowonet.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/1a8b4e5634a993b199012fefa400f43e/3088350727.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/789d6542738ce1141d7fca442252b7e8/58937409657.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/78908045799.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f6ad36ba929---22384885029.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb4707e83a---xesezetutunozufeferig.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ced60d14845---14524666326.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/0fb0dc977c068c7f4e9d766bb6552c3a/koguxasizazoji.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/guzafifedomuwemebemax.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/410548a414ff54f32c6165fdfbcd5933/wutoxonuwalefiwul.pdfIn PDF document text
    • https://webvitamin.vn/app/webroot/uploads/files/11222653849.pdfIn PDF document text
    • http://erisalaw-chicago.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vunepuxug.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d29772dbc32---lazebixowipabuzojuzufaxut.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/824c85eae64367ce04f67284469983a2/fasojebonigoraruraxudiden.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6fec8e689b---2752528104.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/83d8f2d474747746fb37853cfa5bfe4e/3190244934.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/1bea0c010e3f1700e90cbaab3836eff7/bonalorekuzatokodomebiv.pdfIn PDF document text
    • https://anitacalderon.com/ckfinder/userfiles/files/laderumilure.pdfIn PDF document text
    • http://detikakdeti.ru/img/file/juvimomaketiwawadodetose.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f197c1a51f---62091210853.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=hays+salary+guide+2020+irelandPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10061 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11873 17824 bytes
SHA-256: 84f4c1e39269e4057b2f2447a40d0a2040c177a46b180b4428c6958ae8ef2bbb
font_02_sfnt_off00014710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14710 10652 bytes
SHA-256: 1a1905bbec115e4ebdf0cb5b4f7f21c5133e687cae03b497d3da64db5c803268

Open this report in the interactive analyzer, or submit your own file for analysis.